import java.awt.*;

public class demo19 {
    public static int count=0;
    public static void main(String[] args) throws InterruptedException {
        Object locker=new Object();
        Thread t1=new Thread(()->{
            for(int i=0;i<50000;i++){
                synchronized(locker){
                    count++;
                }
            }
        });
        Thread t2=new Thread(()->{
            for(int i=0;i<50000;i++){
                synchronized(locker){
                    count++;
                }
            }
        });
        t1.start();
        t2.start();
        t1.join();
        t2.join();
        System.out.println("count="+count);
    }
}
